Low Vision is a loss of sight that cannot be corrected with ordinary eyeglasses, contact lenses, medicine or surgery. Low vision can affect people of all ages and can have an impact on many aspects of a person’s life. It may cause problems with recognising faces, reading the newspaper, dialling the telephone or seeing road signs.
Causes of Low Vision
Low vision can be due to heredity, disease,an injury or aging. Some of the most common causes of low vision are:
￼ Macular Degeneration (AMD)
￼ Diabetic Retinopathy
￼ Retinitis Pigmentosa (RP)
￼ Stargardt’s Disease
Low Vision Symptoms
Loss of vision can occur suddenly or develop gradually over time. Vision loss may be complete (involving both eyes) or partial, involving only one eye or even certain parts of the visual field. Vision loss is different from blindness that was present at birth. Vision loss can also be considered as loss of sight that cannot be corrected to a normal level with eyeglasses.
Low Vision Assistive Devices
Most people with low vision use multiple low vision aids because each is designed to serve a very specific purpose.
▪ Assistive Technology
▪ Talking Products
▪ Electronic Magnifiers
Legal Blindness ?
The U.S. definition of legal blindness states this about visual acuity:
A visual acuity of 20/200 or less in the better-seeing eye with best conventional correction (meaning with regular glasses or contact lenses). This is a 20/200 visual acuity measurement, correlated with the Snellen Eye Chart
OR a visual field (the total area an individual can see without moving the eyes from side to side) of 20 degrees or less (also called tunnel vision) in the better-seeing eye.
Information provided on Low Vision Miami is intended for divulgative use only and is not a substitute for professional medical advice. If you have any concerns about your visual health, please contact your doctor.